componentbase: update spec reversion

claim that we are compatible to version <=1.1.2
gst-omx requires khronos header file reversion 1.1.2
chromium requires khronos header file reversion 1.1.0

Change-Id: I8df13107c3d2ab900ecf5b5a7af46663188a7bb1
Signed-off-by: Guangxin Xu <guangxin.xu@intel.com>
Signed-off-by: Halley Zhao<halley.zhao@intel.com>
configure: add option --enable-native-buffer default is on

only if __NATIVE_BUFFER_DEFAULT__ is set to 1, ProcessorEnableNativeBuffers
is called when the port is disabled.

gst-omx do not know the details of VideoRenderBuffer

Signed-off-by: Xu Guangxin <guangxin.xu@intel.com>
Signed-off-by: Zhao Halley <halley.zhao@intel.com>
configure: add config option --use-libvacodec

preload libvacodec libs when --enable-libvacodec is used